Category Archives: VMware

SQL query to locate VMs in vCenter server databasee

Here are some SQL commands that may come useful if you are looking for a specific VM when vCenter server goes down. You can run a SQL query to find a VM directly in the database. It will tell you … Continue reading →...

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List storage details with esxcfg-scsidevs in ESXi SSH console

Here is a list of storage commands examples that display storage details on an ESXi host. I recently had to move some storage disks around and received just the vml. numbers without LUN IDs or naa. numbers. This helped me … Continue reading &r...

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ESXi no free space left on device tmp / root is Full

Checking for insufficient inodes:ESXi 5.0:  stat -f /ESXi 5.1+:  localcli system visorfs ramdisk listLinux OS: df -i Review the size of these directories:The /vmimages/ directory is used to store operating system install files such as the V...

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Injecting Async drivers into a VMware ESXi 6 ISO

I was tasked with upgrading our ESXi 5.x environment to ESXi 6 Update 2. The first thing I checked was is if the new ESXi 6 Update 2 image contains the network drivers for the ESXi hosts that I will … Continue reading →...

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Deploying VMware NSX 6.2 in my Lab

When NSX was released i really wanted to set this up in my lab and get a closer look at the features. Once you deploy the NSX Manger appliance you will see an additional section in the web client called … Continue reading →...

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How to clone a single disk on a VM running in VMware ESXi

-ESXi Utility to clone a single VMware virtual disks. SSH to the ESXi host and run the below command. -On a powered OFF VM run it on the disk.vmdk (not the disk-flat.vmdk) -On a Powered ON VM first create a … Continue reading →...

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Understanding Historical “CPU Ready” statistics in VMware vCenter server

One of the most confusing performance metrics in vCenter server is the CPU “Ready” metric. Part of the reason is that this metrics shows up as a “Summation in milliseconds”.  In additional to that the threshold changes depend...

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Boot Windows Server 2012 on ESXi 4.1

I needed to create a Windows Server 2012 R2 on one of our older ESXi hosts and quickly found out that ESXi 4.1 does not support Server 2012 as a guest OS.  The newest guestOS supported is Windows 2008 R2. … Continue reading →...

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iPerf Network performance comparison between Virtual Machines on ESXi6

I finally found some time to run a series of iPerf network performance tests between Windows server 2008 R2, Windows 2012 and a Linux Debian virtual machines. The tests compare bandwidth throughput between vmxnet3, e1000 going through a 1Gbit and &he...

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